diff options
Diffstat (limited to 'src/northbridge/intel/nehalem/northbridge.c')
-rw-r--r-- | src/northbridge/intel/nehalem/northbridge.c | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/src/northbridge/intel/nehalem/northbridge.c b/src/northbridge/intel/nehalem/northbridge.c new file mode 100644 index 0000000000..f9386dedcc --- /dev/null +++ b/src/northbridge/intel/nehalem/northbridge.c @@ -0,0 +1,372 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007-2009 coresystems GmbH + * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. + * Copyright (C) 2013 Vladimir Serbinenko + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <arch/acpi.h> +#include <arch/io.h> +#include <stdint.h> +#include <delay.h> +#include <cpu/intel/model_2065x/model_2065x.h> +#include <cpu/x86/msr.h> +#include <cpu/x86/mtrr.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/hypertransport.h> +#include <stdlib.h> +#include <string.h> +#include <cpu/cpu.h> +#include <cbmem.h> +#include "chip.h" +#include "nehalem.h" + +static int bridge_revision_id = -1; + +int bridge_silicon_revision(void) +{ + if (bridge_revision_id < 0) { + uint8_t stepping = cpuid_eax(1) & 0xf; + uint8_t bridge_id = + pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), + PCI_DEVICE_ID) & 0xf0; + bridge_revision_id = bridge_id | stepping; + } + return bridge_revision_id; +} + +/* Reserve everything between A segment and 1MB: + * + * 0xa0000 - 0xbffff: legacy VGA + * 0xc0000 - 0xcffff: VGA OPROM (needed by kernel) + * 0xe0000 - 0xfffff: SeaBIOS, if used, otherwise DMI + */ +static const int legacy_hole_base_k = 0xa0000 / 1024; +static const int legacy_hole_size_k = 384; + +static void add_fixed_resources(struct device *dev, int index) +{ + struct resource *resource; + + /* 0xe0000000-0xf0000000 PCIe config. + 0xfed10000-0xfed14000 MCH + 0xfed17000-0xfed18000 HECI + 0xfed18000-0xfed19000 DMI + 0xfed19000-0xfed1a000 EPBAR + 0xfed1c000-0xfed20000 RCBA + 0xfed90000-0xfed94000 IOMMU + 0xff800000-0xffffffff ROM. */ + resource = new_resource(dev, index++); + resource->base = (resource_t) 0xe0000000; + resource->size = (resource_t) 0x10000000; + resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + + resource = new_resource(dev, index++); + resource->base = (resource_t) 0xfed00000; + resource->size = (resource_t) 0x00100000; + resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + + mmio_resource(dev, index++, legacy_hole_base_k, + (0xc0000 >> 10) - legacy_hole_base_k); + reserved_ram_resource(dev, index++, 0xc0000 >> 10, + (0x100000 - 0xc0000) >> 10); + +#if CONFIG_CHROMEOS_RAMOOPS + reserved_ram_resource(dev, index++, + CONFIG_CHROMEOS_RAMOOPS_RAM_START >> 10, + CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE >> 10); +#endif +} + +static void pci_domain_set_resources(device_t dev) +{ + assign_resources(dev->link_list); +} + + /* TODO We could determine how many PCIe busses we need in + * the bar. For now that number is hardcoded to a max of 64. + * See e7525/northbridge.c for an example. + */ +static struct device_operations pci_domain_ops = { + .read_resources = pci_domain_read_resources, + .set_resources = pci_domain_set_resources, + .enable_resources = NULL, + .init = NULL, + .scan_bus = pci_domain_scan_bus, + .ops_pci_bus = pci_bus_default_ops, +}; + +static void mc_read_resources(device_t dev) +{ + uint32_t tseg_base; + uint64_t TOUUD; + uint16_t reg16; + + pci_dev_read_resources(dev); + + tseg_base = pci_read_config32(dev_find_slot(0, PCI_DEVFN(0, 0)), TSEG); + TOUUD = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), + D0F0_TOUUD); + + printk(BIOS_DEBUG, "ram_before_4g_top: 0x%x\n", tseg_base); + printk(BIOS_DEBUG, "TOUUD: 0x%x\n", (unsigned)TOUUD); + + /* Report the memory regions */ + ram_resource(dev, 3, 0, 640); + ram_resource(dev, 4, 768, ((tseg_base >> 10) - 768)); + + /* Using uma_resource() here would fail as base & size cannot + * be used as-is for a single MTRR. This would cause excessive + * use of MTRRs. + * + * Use of mmio_resource() instead does not create UC holes by using + * MTRRs, but making these regions uncacheable is taken care of by + * making sure they do not overlap with any ram_resource(). + * + * The resources can be changed to use separate mmio_resource() + * calls after MTRR code is able to merge them wisely. + */ + mmio_resource(dev, 5, tseg_base >> 10, CONFIG_SMM_TSEG_SIZE >> 10); + + reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), D0F0_GGC); + const int uma_sizes_gtt[16] = + { 0, 1, 0, 2, 0, 0, 0, 0, 0, 2, 3, 4, 42, 42, 42, 42 }; + /* Igd memory */ + const int uma_sizes_igd[16] = { + 0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352, 256, 512 + }; + u32 igd_base, gtt_base; + int uma_size_igd, uma_size_gtt; + + uma_size_igd = uma_sizes_igd[(reg16 >> 4) & 0xF]; + uma_size_gtt = uma_sizes_gtt[(reg16 >> 8) & 0xF]; + + igd_base = + pci_read_config32(dev_find_slot(0, PCI_DEVFN(0, 0)), D0F0_IGD_BASE); + gtt_base = + pci_read_config32(dev_find_slot(0, PCI_DEVFN(0, 0)), D0F0_GTT_BASE); + mmio_resource(dev, 6, gtt_base >> 10, uma_size_gtt << 10); + mmio_resource(dev, 7, igd_base >> 10, uma_size_igd << 10); + + if (TOUUD > 4096) + ram_resource(dev, 8, (4096 << 10), ((TOUUD - 4096) << 10)); + + /* This memory is not DMA-capable. */ + if (TOUUD >= 8192 - 64) + bad_ram_resource(dev, 9, 0x1fc000000ULL >> 10, 0x004000000 >> 10); + + add_fixed_resources(dev, 10); + + set_top_of_ram(tseg_base); +} + +static void mc_set_resources(device_t dev) +{ + /* And call the normal set_resources */ + pci_dev_set_resources(dev); +} + +static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device) +{ + if (!vendor || !device) { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + pci_read_config32(dev, PCI_VENDOR_ID)); + } else { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + ((device & 0xffff) << 16) | (vendor & + 0xffff)); + } +} + +static void northbridge_dmi_init(struct device *dev) +{ + u32 reg32; + + /* Clear error status bits */ + DMIBAR32(0x1c4) = 0xffffffff; + DMIBAR32(0x1d0) = 0xffffffff; + + /* Steps prior to DMI ASPM */ + if ((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_SNB) { + reg32 = DMIBAR32(0x250); + reg32 &= ~((1 << 22) | (1 << 20)); + reg32 |= (1 << 21); + DMIBAR32(0x250) = reg32; + } + + reg32 = DMIBAR32(0x238); + reg32 |= (1 << 29); + DMIBAR32(0x238) = reg32; + + if (bridge_silicon_revision() >= SNB_STEP_D0) { + reg32 = DMIBAR32(0x1f8); + reg32 |= (1 << 16); + DMIBAR32(0x1f8) = reg32; + } else if (bridge_silicon_revision() >= SNB_STEP_D1) { + reg32 = DMIBAR32(0x1f8); + reg32 &= ~(1 << 26); + reg32 |= (1 << 16); + DMIBAR32(0x1f8) = reg32; + + reg32 = DMIBAR32(0x1fc); + reg32 |= (1 << 12) | (1 << 23); + DMIBAR32(0x1fc) = reg32; + } + + /* Enable ASPM on SNB link, should happen before PCH link */ + if ((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_SNB) { + reg32 = DMIBAR32(0xd04); + reg32 |= (1 << 4); + DMIBAR32(0xd04) = reg32; + } + + reg32 = DMIBAR32(0x88); + reg32 |= (1 << 1) | (1 << 0); + DMIBAR32(0x88) = reg32; +} + +static void northbridge_init(struct device *dev) +{ + u8 bios_reset_cpl; + u32 bridge_type; + + northbridge_dmi_init(dev); + + bridge_type = MCHBAR32(0x5f10); + bridge_type &= ~0xff; + + if ((bridge_silicon_revision() & BASE_REV_MASK) == BASE_REV_IVB) { + /* Enable Power Aware Interrupt Routing */ + u8 pair = MCHBAR8(0x5418); + pair &= ~0xf; /* Clear 3:0 */ + pair |= 0x4; /* Fixed Priority */ + MCHBAR8(0x5418) = pair; + + /* 30h for IvyBridge */ + bridge_type |= 0x30; + } else { + /* 20h for Sandybridge */ + bridge_type |= 0x20; + } + MCHBAR32(0x5f10) = bridge_type; + + /* + * Set bit 0 of BIOS_RESET_CPL to indicate to the CPU + * that BIOS has initialized memory and power management + */ + bios_reset_cpl = MCHBAR8(BIOS_RESET_CPL); + bios_reset_cpl |= 1; + MCHBAR8(BIOS_RESET_CPL) = bios_reset_cpl; + printk(BIOS_DEBUG, "Set BIOS_RESET_CPL\n"); + + /* Configure turbo power limits 1ms after reset complete bit */ + mdelay(1); +#ifdef DISABLED + set_power_limits(28); + + /* + * CPUs with configurable TDP also need power limits set + * in MCHBAR. Use same values from MSR_PKG_POWER_LIMIT. + */ + if (cpu_config_tdp_levels()) { + msr_t msr = rdmsr(MSR_PKG_POWER_LIMIT); + MCHBAR32(0x59A0) = msr.lo; + MCHBAR32(0x59A4) = msr.hi; + } +#endif + /* Set here before graphics PM init */ + MCHBAR32(0x5500) = 0x00100001; +} + +static void northbridge_enable(device_t dev) +{ +#if CONFIG_HAVE_ACPI_RESUME + switch (pci_read_config32(dev, SKPAD)) { + case 0xcafebabe: + printk(BIOS_DEBUG, "Normal boot.\n"); + acpi_slp_type = 0; + break; + case 0xcafed00d: + printk(BIOS_DEBUG, "S3 Resume.\n"); + acpi_slp_type = 3; + break; + default: + printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n"); + acpi_slp_type = 0; + break; + } +#endif +} + +static struct pci_operations intel_pci_ops = { + .set_subsystem = intel_set_subsystem, +}; + +static struct device_operations mc_ops = { + .read_resources = mc_read_resources, + .set_resources = mc_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = northbridge_init, + .enable = northbridge_enable, + .scan_bus = 0, + .ops_pci = &intel_pci_ops, +}; + +static const struct pci_driver mc_driver_44 __pci_driver = { + .ops = &mc_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x0044, /* Nehalem */ +}; + +static void cpu_bus_init(device_t dev) +{ + initialize_cpus(dev->link_list); + /* Enable ROM caching if option was selected. */ + x86_mtrr_enable_rom_caching(); +} + +static void cpu_bus_noop(device_t dev) +{ +} + +static struct device_operations cpu_bus_ops = { + .read_resources = cpu_bus_noop, + .set_resources = cpu_bus_noop, + .enable_resources = cpu_bus_noop, + .init = cpu_bus_init, + .scan_bus = 0, +}; + +static void enable_dev(device_t dev) +{ + /* Set the operations if it is a special bus type */ + if (dev->path.type == DEVICE_PATH_DOMAIN) { + dev->ops = &pci_domain_ops; + } else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) { + dev->ops = &cpu_bus_ops; + } +} + +struct chip_operations northbridge_intel_nehalem_ops = { + CHIP_NAME("Intel i7 (Nehalem) integrated Northbridge") + .enable_dev = enable_dev, +}; |